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In 1864, at the height of the Civil War, Reverend Elias Hillard set out to document a bit of history from a previous war - the American Revolution - before it was too late.

His subjects were the last remaining soldiers of the Revolutionary War, six men between the ages of 100 and 105, who managed not only to escape the war with their lives, but also managed to live decades beyond the average life expectancy of the time.

It was a fascinating undertaking for a variety of reasons, not the least of which is that Elias and his photographer, Nelson Augustus Moore, managed to snap the only photographs ever taken of anyone that participated in the War for Independence.

Like William Hutchings, Daniel Waldo's involvement in the Revolutionary War began at a young age - 16.

Drafted into the Continental Army in 1778, Waldo served for a year before being captured by the British, after which he was taken to New York, where he was held prisoner with other members of his company.

Waldo and his fellow prisoners were held in a Sugar House Prison - a sugar refinery that was converted into a prison because of its stone and brick construction that made escape difficult.

Waldo, along with other Sugar House Prisoners, was released two months later as part of a prisoner exchange with the British.

He went on to become a minister, serving as the chaplain of the House of Representatives at the ripe old age of 96.

When Lemuel Cook enlisted for service in the war, he was told that he was too small, and that the only way he could serve was to sign up for the duration of the war.

So, instead of serving for three months, six months, or one year, as was typical, Cook enlisted to serve for the duration, seeing battle at the likes of Brandywine, and also witnessing Cornwallis' surrender at Yorktown to end the war.

Cook was born in Connecticut on September 10, 1761, and died on May 20, 1866, at nearly 105 years of age.